Compilare: user.cpp: In function ‘int main()’: user.cpp:20:93: warning: narrowing conversion of ‘32768’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] short p2[18]= {1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192,16384,32768,65536,121000}; ^ user.cpp:20:93: warning: narrowing conversion of ‘65536’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] user.cpp:20:93: warning: overflow in implicit constant conversion [-Woverflow] user.cpp:20:93: warning: narrowing conversion of ‘121000’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] user.cpp:20:93: warning: overflow in implicit constant conversion [-Woverflow] user.cpp:18:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,2900000,stdin); ^ user.cpp: In function ‘void read(int&)’: user.cpp:11:107: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] while(buff[pos] < '0' || buff[pos] > '9') if(++pos == 2900000) fread(buff, 1, 2900000, stdin), pos = 0; ^ user.cpp:13:141: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] while('0' <= buff[pos] && buff[pos] <= '9') {nr = nr * 10 + buff[pos] - '0';if(++pos == 2900000) fread(buff, 1, 2900000, stdin), pos = 0;} ^